Journal of The Geomorphological Association of Korea (한국지형학회지)
- Volume 25 Issue 1
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- Pages.1-17
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- 2018
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- 1226-4296(pISSN)
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A Study on the Characteristics and Burial Ages of Sediment Deposits at Jiduri, Daecheong Island
대청도 지두리 해안의 모래 퇴적층의 특성과 매몰연대에 대한 연구
- Kim, Jong Yeon (Department of Geography Education, Chungbuk National University)
- 김종연 (충북대학교 지리교육과)
- Received : 2018.02.07
- Accepted : 2018.03.23
- Published : 2018.03.31
Abstract
The characteristics and burial ages of sand sediments on the Jiduri coast in Daechung-myeon, Ongjin-gun, Incheon were investigated. Daecheong Island is the area where the characteristics of the rocky coast and sand coast are shown. Various studies have been conducted on the Okjukdong sand dune that appears in the north of the island. However, there has been no study on the sandy sedimentary topography of the Jiduri and Moraewul area in the south. The sandy sedimentary terrain of Jiduri is divided into sandy beaches, sand dunes and sand deposits along the slope including climbing dune. Overall, the depth of sandy sediments in Jiduri is not deep. The characteristics of sandy sediments and burial ages were investigated at an elevation of about 23 m above sea level at the back of Jiduli Beach and 46 m above sea level at the ridge line between Jiduri and Moraewol. From the Jiduri coast to the hillside behind, the average grain size decreases and the sorting becomes better as it moves from the intertidal zone to the beach and the foredune. This indicates the selective sand transport by the wind and can be judged by the terrain formed under the current sedimentation environment. The average grain size at the upper part of the section of JD-1 (elevation of about 23m MSL) was